PDF作者或所有者可以对他/她的PDF文件设置不同的限制。因此，根据PDF启用的限制，您将无法复制PDF文档的内容、在没有正确密码的情况下打开PDF 、编辑文本、注释或(PDF)突出显示 PDF(highlight PDF)、高质量打印PDF文件等。如果您想从某些PDF中删除此类限制，那么这篇文章有简单的解决方案。
在您急于删除PDF限制之前，您必须拥有设置为输入权限/限制的密码。否则，这些选项将不起作用。
免费删除 PDF 限制
这篇文章包括两个免费的在线工具和两个从PDF(PDF)中删除权限的免费软件。虽然服务对PDF文件设置了大小限制，但本文介绍的软件可帮助您添加PDF，而没有任何大小限制。让我们检查一下这些PDF权限删除软件和服务。
- Online2pdf.com
- PDF2Go
- PDF限制卸妆
- PDF 解锁。
让我们来看看它们。
1] Online2pdf.com
Online2pdf.com提供了很多功能。它可以让您压缩 PDF(compress PDF)文档、旋转页面、将 PDF 转换(convert PDF)为Excel、Word和PowerPoint、重新排列PDF页面、保护 PDF、解锁PDF等。您需要使用该解锁PDF功能从PDF中删除权限。
使它变得更好的选项是您可以一次删除(remove restrictions)多个 PDF 文件(multiple PDF files)的限制。您可以一次(at once)上传20 个 PDF(20 PDF)文件，还可以设置在输出中获取单独的PDF文件或单个或合并的PDF文件的选项。单个 PDF的大小限制为100 MB ，多个 PDF 的大小限制为(100 MB)150 MB。
要从PDF中删除限制，请使用此链接(this link)。之后，您可以使用浏览(Browse)按钮上传单个或多个PDF文件。上传PDF(PDF)文件后，单击PDF 读取保护(PDF read protection)图标并输入打开密码。如果PDF没有密码保护，您可以保留该选项。之后，确保将转换为(convert to)选项设置为PDF，以便您仅获得PDF格式的输出。
使用转换(Convert)按钮，然后您将获得没有任何限制的输出PDF 。在转换之前，您还可以使用“保护”(Protection)选项卡添加新的权限（打开密码、修改锁等）。否则，生成解锁的PDF并使用它。
2] PDF2Go
PDF2Go服务具有类似于Online2pdf.com的功能。您可以使用不同的工具，如压缩PDF、排序和删除PDF页面、使 PDF 可搜索(make PDF searchable)、更改PDF页面的大小、保护PDF、修复 PDF(repair PDF)、解锁PDF等。解锁功能有一些有趣的选项，使其有用。
您可以解锁多个 PDF(unlock multiple PDFs)或单个PDF。它支持四种上传PDF的方式。您可以从桌面(desktop)、Dropbox、Google Drive上传PDF，或添加(add URL)在线PDF的 URL 。无需注册或使用免费帐户即可使用此服务。免费的未注册计划可让您上传最大50 MB大小的PDF并一次解锁 3 个 PDF 。(unlock 3 PDFs)另一方面，其免费注册计划支持100 MB大小的 PDF，并帮助您一次解锁 5 个 PDF(unlock 5 PDFs)。
单击此处(here)打开其PDF解锁页面。打开后，从任何支持的来源上传PDF ，提供(PDF)PDF的打开密码，然后按开始(Start)按钮。这将完成工作并从PDF中删除权限。
阅读(Read)：如何使用免费软件或在线工具从 PDF 中删除密码(How to remove Password from PDF with Free Software or Online Tool)。
3] PDF限制卸妆
PDF Restrictions Remover是一款界面非常简单的免费软件。它具有批量删除(batch remove restrictions)PDF文件限制的功能。您可以添加不同的PDF(PDFs)，添加它们的打开密码，然后开始生成没有任何打印、复制和编辑限制的输出PDF文件的过程。(PDF)
使用这个PDF保护去除器也很容易。使用添加 PDF(Add PDF)按钮并输入他们的密码。您还可以安排输入文件的顺序并从列表中删除任何PDF 。按创建 PDF(Create PDF)按钮，它将删除限制并将输出文件存储在单独的文件夹中。您无法设置输出文件夹。它会自动在Documents下创建一个文件夹，并在处理完所有(Documents)PDF(PDFs)后打开该文件夹。
你可以从这里(here)下载这个软件。
4] PDF解锁
PDF Unlock是一款小巧的软件，从PDF中删除限制的功能非常有效。您还可以添加多个PDF(PDFs)，但所有这些PDF(PDFs)都应具有相同的打开密码以消除限制。如果您的PDF文档有不同的密码，那么您需要一一解锁。
使用Select PDF/s按钮添加PDF文件。虽然它的界面显示您可以拖动PDF(PDFs)，但此功能不起作用。添加PDF时，请提供打开密码。您还可以选择将解锁的PDF(PDFs)保存在同一原始文件夹或其他文件夹中。设置选项并按解锁(Unlock)按钮以获取输出。
你可以在这里(here)下载。
因此，这些是消除PDF限制的一些不错的选择，之后您可以复制、打印、修改和突出显示PDF文件。希望这些选项会有所帮助。
Remove PDF Restrictions using free software or online tools
A PDF author or ownеr can put different restrictions on hiѕ/her PDF file. So, depending on the restrictions enаbled оn РDF, you won’t be able to copy the content of PDF document, open PDF without the correct рaѕsword, edit text, annotate or highlight PDF, take high-quality print of PDF file, etc. If you want to remove such restrictions from some PDF, then this post has easy solutions.
Before you hurry to remove PDF restrictions, you must have the password that was set to enter permissions/restrictions. Otherwise, these options won’t work.
Remove PDF Restrictions free
This post includes two free online tools and two free software to remove permissions from PDF. While services put a size limit on PDF files, software covered on this post help you add PDF without any size limit. Let’s check these PDF permission remover software and services.
- Online2pdf.com
- PDF2Go
- PDF Restrictions Remover
- PDF Unlock.
Let us take a look at them.
1] Online2pdf.com
Online2pdf.com offers a lot of features. It lets you compress PDF documents, rotate pages, convert PDF to Excel, Word, and PowerPoint, rearrange PDF pages, protect PDF, unlock PDF, etc. You need to use that unlock PDF feature to remove permissions from PDF.
The option that makes it better is you can remove restrictions from multiple PDF files at a time. You can upload 20 PDF files at once and also set the option to get separate PDF files in the output or a single or merged PDF file. The size limit is restricted to 100 MB for a single PDF and 150 MB for multiple PDFs.
To remove restrictions from PDF, use this link. After that, you can upload single or multiple PDF files using the Browse button. When a PDF file is uploaded, click on PDF read protection icon and enter the opening password. If PDF is not password protected, you can leave that option. After that, make sure convert to option is set to PDF so that you will get the output in PDF format only.
Use Convert button and then you will get the output PDF without any restrictions. Before conversion, you can also add new permissions (opening password, lock modifying, etc.) using the Protection tab. Otherwise, generate unlocked PDF and use it.
2] PDF2Go
PDF2Go service has features similar to Online2pdf.com. You can use different tools like compress PDF, sort and delete PDF pages, make PDF searchable, change the size of PDF page, protect PDF, repair PDF, unlock PDF, etc. The unlock feature has some interesting options that make it useful.
You can unlock multiple PDFs or a single PDF. It supports four ways to upload a PDF. You can upload a PDF from desktop, Dropbox, Google Drive, or add URL of an online PDF. This service can be used without sign up or with a free account. The free unregistered plan lets you upload PDF with a maximum of 50 MB size and unlock 3 PDFs at once. On the other hand, its free registered plan supports 100 MB size PDF and helps you unlock 5 PDFs at a time.
Click here to open its PDF unlock page. After opening it, upload PDF from any of the supported sources, provide the opening password of PDF, and then press Start button. This will do the work and remove permissions from PDF.
Read: How to remove Password from PDF with Free Software or Online Tool.
3] PDF Restrictions Remover
PDF Restrictions Remover is free software with a very simple interface. It has the feature to batch remove restrictions from PDF files. You can add different PDFs, add their opening passwords, and then begin the process to generate output PDF files that won’t have any printing, copying, and editing restrictions.
Using this PDF protection remover is also easy. Use Add PDF button and enter their passwords. You can also arrange orders of input files and remove any PDF from the list. Press Create PDF button and it will remove restrictions and store output files in a separate folder. You can’t set the output folder. It automatically creates a folder under Documents and opens that folder once all the PDFs are processed.
You can download this software from here.
4] PDF Unlock
PDF Unlock is a tiny software and the feature to remove restrictions from PDF works very well. You can also add multiple PDFs, but all those PDFs should have the same opening password to remove restrictions. If your PDF documents have different passwords, then you need to unlock them one by one.
Use Select PDF/s button to add a PDF file. Though its interface shows you can drag PDFs but this feature doesn’t work. When PDF is added, provide the opening password. You also have the choice to save unlocked PDFs in the same original folder or some other folder. Set the options and press Unlock button to get the output.
You can download it here.
So these are some good options to remove PDF restrictions after which you can copy, print, modify, and highlight PDF files. Hope these options will help.
